:Product: 1218RSGA.txt
:Issued: 2010 Dec 18 2200 UTC
# Prepared jointly by the U.S. Dept. of Commerce, NOAA,
# Space Weather Prediction Center and the U.S. Air Force.
#
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 352 Issued at 2200Z on 18 Dec 2010
IA.  Analysis of Solar Active Regions and Activity from  17/2100Z
to 18/2100Z:  Solar activity was very low.  Region 1135 (N19W11) is
spotless today.  No significant events were observed during the
period.
IB.  Solar Activity Forecast:  Solar activity is expected to be very
low.
IIA.  Geophysical Activity Summary 17/2100Z to 18/2100Z:
The geomagnetic field was quiet.
IIB.  Geophysical Activity Forecast:  The geomagnetic field is
expected to be at quiet to unsettled levels for days one and two
(19-20 December) due to the influence of a coronal hole high speed
stream.  Quiet conditions are expected for day three (21 December).
III.  Event Probabilities 19 Dec-21 Dec
Class M    01/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       Green
IV.  Penticton 10.7 cm Flux
Observed           18 Dec 081
Predicted   19 Dec-21 Dec  080/078/078
90 Day Mean        18 Dec 083
V.  Geomagnetic A Indices
Observed Afr/Ap 17 Dec  002/003
Estimated Afr/Ap 18 Dec  002/005
Predicted Afr/Ap 19 Dec-21 Dec  007/008-007/008-005/005
VI.  Geomagnetic Activity Probabilities 19 Dec-21 Dec
A.  Middle Latitudes
Active                10/10/05
Minor storm           01/01/01
Major-severe storm    01/01/00
B.  High Latitudes
Active                15/15/05
Minor storm           05/05/01
Major-severe storm    01/01/01